Table 4. Added surgical procedures accompanying cholecystectomy.

Surgical procedure*	Cause	Number
Radical cholecystectomy	Malignancy in frozen section examination	2
Added hepatectomy	Inflammatory tissue infiltrated into the liver or hepatic abscesses were formed	41
Extrahepatic biliary tract exploration	choledocholithiasis	39
Choledochorrhaphy	Mirizzi’s syndrome	12
T-tube drainage	CBD cholangiolithiasis and Mirizzi’s syndrome	22
Pancreaticoduodenectomy	The lesion involved the pancreas	2

*, some patients were received more than one of these procedures.